for (Tuple tuple : followers){
String follower = tuple.getElement();
start = tuple.getScore();
trans.zadd("home:" + follower, postTime, String.valueOf(postId));
trans.zrange("home:" + follower, 0, -1);
trans.zremrangeByRank(
"home:" + follower, 0, 0 - HOME_TIMELINE_SIZE - 1);
}
trans.exec();
if (followers.size() >= POSTS_PER_PASS) {